استنباط و رسم خطوط الكنتور على الخرائط الطبوغرافية مقياس 1 : 50 000 من خلال تحليل نموذج الارتفاعات الرقمية DEM باستخدام نظم المعلومات الجغرافية GIS

الملخص EN

This research topographic map started by estimation ideal interval contour lines, in order to present the accurate, and actual topographic elevations without any intersect or joining between contour lines, on topographic maps, especially in steep areas, which can be led to misreading or analyzing the topographic map.

The Swiss cartographer (Edward Imhof) suggested that the interval line between the contour line on topographic map should not be less than one millimeter.

While the Russian cartographer Salishev Konstantin suggested that the distance between the contour lines on the map should be no less than 0.25 mm.

Analysis of digital elevation models have been implemented by using the geography information system (Arc GIS) software, in order to derive and drown the contour lines on a topographic map with scale (1:50 000) for Ohed mountain.

After the generation these lines were based on the best estimation of interval contour line due to Edward Emhof suggestion and by implementing mathematical equation which is presented by Salishev Konstantin.The study found that when the contour lines are derived from digital elevation models, it is very difficult to draw the contour line directly on the topographic maps because they are unreadable and unclear, so it should be determined by the appropriate interval contour line and then apply the necessary cartographic elements to be more appropriate for the topographic map scale, then it will be clear and readable.

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